Answer:
25a-40b-10 is your answer, hope this helped :)
Step-by-step explanation:
7.32a + 2.1(2.7 -18a)
7.32a + 5.67 - 37.8a (multiply 2.1 to 2.7 and 18a)
5.67 - 30.48a (combine 7.32a and -37.8a since they are like terms)
All except for h(x) are exponential growth because it is over 1